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A192320
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Numbers k for which there are no prime numbers in the range (k-4*sqrt(sqrt(k)), k].
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2
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1, 1352, 1353, 1354, 1355, 1356, 1357, 1358, 1359, 1360, 19657, 19658, 19659, 19660, 25522, 31451, 31452, 31453, 31454, 31455, 31456, 31457, 31458, 31459, 31460, 31461, 31462, 31463, 31464, 31465, 31466, 31467, 31468, 34116, 34117, 34118, 34119, 34120, 34121, 34122
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OFFSET
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1,2
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COMMENTS
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a(69) = 492226 is probably the last term. Any further terms must be greater than 1.5 * 10^18. [Charles R Greathouse IV, Jun 27 2011]
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LINKS
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MAPLE
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isA192320 := proc(n) floor( n-4*root[4](n)) ; nextprime(%) > n ; end proc:
for n from 1 do if isA192320(n) then printf("%d, \n", n) ; end if; end do: # R. J. Mathar, Jun 29 2011
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PROG
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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